Year	current US$
1960	111000000
1961	112000000
1962	113000000
1963	113000000
1964	177000000
1965	197000000
1966	237000000
1967	229000000
1968	257000000
1969	239000000
1970	318000000
1971	382000000
1972	404000000
1973	497000000
1974	753000000
1975	778000000
1976	638000000
1977	744000000
1978	1145000000
1979	1105000000
1980	1252000000
1981	1213000000
1982	1166000000
1983	832000000
1984	665000000
1985	1324000000
1986	937000000
1987	929000000
1988	823000000
1989	990000000
1990	1027000000
1991	1533000000
1992	1510000000
1993	1497000000
1994	1504000000
1995	1675000000
1996	1388000000
1997	1337000000
1998	1453000000
1999	1556000000
2000	1524000000
2001	1712000000
2002	1660000000
2003	2125000000
2004	2726000000
2005	3287000000
2006	4246000000
2007	5337000000
2008	7703000000
2009	6411000000
2010	7874000000
2011	10799000000
2012	11346000000
2013	12091000000
2014	11993000000
2015	10789000000
2016	9300000000
2017	8299000000
2018	9120000000
2019	9452000000
2020	8439000000
2021	10024000000
2022	14219000000
2023	13817000000